362989
Current sensitivity of a moving coil galvanometer is \(5div/mA\) and its voltage sensitivity (angular deflection per unit voltage applied) is \(20div/V\). The resistance of the galvanometer is
1 \(250 \Omega\)
2 \(500 \Omega\)
3 \(25 \Omega\)
4 \(40 \Omega\)
Explanation:
5 div. \(=1 m A \Rightarrow 1 d i v .=\dfrac{1}{5} m A\) Similarly 1 div. \(=\dfrac{1}{20}\) volts \(R=\dfrac{V}{i}=\dfrac{\dfrac{1}{20}}{\dfrac{1}{5} \times 10^{-3}}=\dfrac{1}{4} \times 10^{-3}=250 \Omega\)
NEET - 2018
PHXII04:MOVING CHARGES AND MAGNETISM
362990
A wire of length ' \(L\) ' is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is
1 Circular
2 Elliptical
3 Rectangular
4 Square
Explanation:
Sensitivity is directly proportional to area of the loop. The area is great for circualr shape for given length.
PHXII04:MOVING CHARGES AND MAGNETISM
362991
A current of \(10^{-5}\) A produces a deflection of \(10^{\circ}\) in a moving coil galvanometer. A current of \(10^{-6} \mathrm{amp}\) in the same galvanometer produces a deflection of
1 \((1 / 100)^{\circ}\)
2 \(10^{\circ}\)
3 \(0.1^{\circ}\)
4 \(1^{\circ}\)
Explanation:
\(C \theta=N I A\) \(\theta \propto I\) \(\dfrac{\theta_{1}}{\theta_{2}}=\dfrac{I_{1}}{I_{2}}\) \(\Rightarrow \theta_{2}=1^{\circ}\)
PHXII04:MOVING CHARGES AND MAGNETISM
362992
The coil of the moving coil galvanometer is wound over an aluminium frame
362989
Current sensitivity of a moving coil galvanometer is \(5div/mA\) and its voltage sensitivity (angular deflection per unit voltage applied) is \(20div/V\). The resistance of the galvanometer is
1 \(250 \Omega\)
2 \(500 \Omega\)
3 \(25 \Omega\)
4 \(40 \Omega\)
Explanation:
5 div. \(=1 m A \Rightarrow 1 d i v .=\dfrac{1}{5} m A\) Similarly 1 div. \(=\dfrac{1}{20}\) volts \(R=\dfrac{V}{i}=\dfrac{\dfrac{1}{20}}{\dfrac{1}{5} \times 10^{-3}}=\dfrac{1}{4} \times 10^{-3}=250 \Omega\)
NEET - 2018
PHXII04:MOVING CHARGES AND MAGNETISM
362990
A wire of length ' \(L\) ' is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is
1 Circular
2 Elliptical
3 Rectangular
4 Square
Explanation:
Sensitivity is directly proportional to area of the loop. The area is great for circualr shape for given length.
PHXII04:MOVING CHARGES AND MAGNETISM
362991
A current of \(10^{-5}\) A produces a deflection of \(10^{\circ}\) in a moving coil galvanometer. A current of \(10^{-6} \mathrm{amp}\) in the same galvanometer produces a deflection of
1 \((1 / 100)^{\circ}\)
2 \(10^{\circ}\)
3 \(0.1^{\circ}\)
4 \(1^{\circ}\)
Explanation:
\(C \theta=N I A\) \(\theta \propto I\) \(\dfrac{\theta_{1}}{\theta_{2}}=\dfrac{I_{1}}{I_{2}}\) \(\Rightarrow \theta_{2}=1^{\circ}\)
PHXII04:MOVING CHARGES AND MAGNETISM
362992
The coil of the moving coil galvanometer is wound over an aluminium frame
362989
Current sensitivity of a moving coil galvanometer is \(5div/mA\) and its voltage sensitivity (angular deflection per unit voltage applied) is \(20div/V\). The resistance of the galvanometer is
1 \(250 \Omega\)
2 \(500 \Omega\)
3 \(25 \Omega\)
4 \(40 \Omega\)
Explanation:
5 div. \(=1 m A \Rightarrow 1 d i v .=\dfrac{1}{5} m A\) Similarly 1 div. \(=\dfrac{1}{20}\) volts \(R=\dfrac{V}{i}=\dfrac{\dfrac{1}{20}}{\dfrac{1}{5} \times 10^{-3}}=\dfrac{1}{4} \times 10^{-3}=250 \Omega\)
NEET - 2018
PHXII04:MOVING CHARGES AND MAGNETISM
362990
A wire of length ' \(L\) ' is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is
1 Circular
2 Elliptical
3 Rectangular
4 Square
Explanation:
Sensitivity is directly proportional to area of the loop. The area is great for circualr shape for given length.
PHXII04:MOVING CHARGES AND MAGNETISM
362991
A current of \(10^{-5}\) A produces a deflection of \(10^{\circ}\) in a moving coil galvanometer. A current of \(10^{-6} \mathrm{amp}\) in the same galvanometer produces a deflection of
1 \((1 / 100)^{\circ}\)
2 \(10^{\circ}\)
3 \(0.1^{\circ}\)
4 \(1^{\circ}\)
Explanation:
\(C \theta=N I A\) \(\theta \propto I\) \(\dfrac{\theta_{1}}{\theta_{2}}=\dfrac{I_{1}}{I_{2}}\) \(\Rightarrow \theta_{2}=1^{\circ}\)
PHXII04:MOVING CHARGES AND MAGNETISM
362992
The coil of the moving coil galvanometer is wound over an aluminium frame
362989
Current sensitivity of a moving coil galvanometer is \(5div/mA\) and its voltage sensitivity (angular deflection per unit voltage applied) is \(20div/V\). The resistance of the galvanometer is
1 \(250 \Omega\)
2 \(500 \Omega\)
3 \(25 \Omega\)
4 \(40 \Omega\)
Explanation:
5 div. \(=1 m A \Rightarrow 1 d i v .=\dfrac{1}{5} m A\) Similarly 1 div. \(=\dfrac{1}{20}\) volts \(R=\dfrac{V}{i}=\dfrac{\dfrac{1}{20}}{\dfrac{1}{5} \times 10^{-3}}=\dfrac{1}{4} \times 10^{-3}=250 \Omega\)
NEET - 2018
PHXII04:MOVING CHARGES AND MAGNETISM
362990
A wire of length ' \(L\) ' is made in the form of a coil in a moving coil galvanometer. To have maximum sensitiveness the shape of the coil is
1 Circular
2 Elliptical
3 Rectangular
4 Square
Explanation:
Sensitivity is directly proportional to area of the loop. The area is great for circualr shape for given length.
PHXII04:MOVING CHARGES AND MAGNETISM
362991
A current of \(10^{-5}\) A produces a deflection of \(10^{\circ}\) in a moving coil galvanometer. A current of \(10^{-6} \mathrm{amp}\) in the same galvanometer produces a deflection of
1 \((1 / 100)^{\circ}\)
2 \(10^{\circ}\)
3 \(0.1^{\circ}\)
4 \(1^{\circ}\)
Explanation:
\(C \theta=N I A\) \(\theta \propto I\) \(\dfrac{\theta_{1}}{\theta_{2}}=\dfrac{I_{1}}{I_{2}}\) \(\Rightarrow \theta_{2}=1^{\circ}\)
PHXII04:MOVING CHARGES AND MAGNETISM
362992
The coil of the moving coil galvanometer is wound over an aluminium frame
